Monthly outlook for St. Johns, MI: average high 61.8°, average low 45.7°. That is 3.1° above the climate normal for October. Precipitation is expected on 5 days (about 2.7 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 23 October (74.8°), the coolest 17 October (34.8°).
61.8°/45.7°
Average high / low
+3.1°
Above normal
5 / 5
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
63.5°
57.2°
+3.5°
24 October – 2 November
58.9°
54.1°
+2.7°
3 November – 12 November
at normal
49.1°
—
October records over 66 years
84.9°3 October 2023All-time high
22.1°29 October 1967All-time low
Thu, 1562° / 49°0.15
62 °
St. Johns, Thursday, 15 October
Rain. High 62°, low 49°.
Pressure30.15 inHg
Wind8.4 mph SE
Humidity64%
Visibility6.2 mi
Dew point47°
Fri, 1659° / 44°0.21
59 °
St. Johns, Friday, 16 October
Rain. High 59°, low 44°.
Pressure29.80 inHg
Wind14 mph W
Humidity83%
Visibility6.2 mi
Dew point49°
Sat, 1754° / 35°0
54 °
St. Johns, Saturday, 17 October
Clear. High 54°, low 35°.
Pressure30.47 inHg
Wind4.5 mph W
Humidity57%
Visibility6.2 mi
Dew point33°
Sun, 1860° / 42°0
60 °
St. Johns, Sunday, 18 October
Clear. High 60°, low 42°.
Pressure30.45 inHg
Wind14.5 mph SW
Humidity48%
Visibility6.2 mi
Dew point36°
Mon, 1963° / 42°0
63 °
St. Johns, Monday, 19 October
Clear. High 63°, low 42°.
Pressure30.39 inHg
Wind9.7 mph SW
Humidity42%
Visibility—
Dew point36°
Tue, 2065° / 38°0
65 °
St. Johns, Tuesday, 20 October
Mostly clear. High 65°, low 38°.
Pressure30.36 inHg
Wind3.6 mph SE
Humidity48%
Visibility—
Dew point40°
Wed, 2167° / 47°0
67 °
St. Johns, Wednesday, 21 October
Overcast. High 67°, low 47°.
Pressure30.39 inHg
Wind7.6 mph S
Humidity39%
Visibility—
Dew point39°
Thu, 2268° / 48°0
68 °
St. Johns, Thursday, 22 October
Overcast. High 68°, low 48°.
Pressure30.30 inHg
Wind9 mph S
Humidity48%
Visibility—
Dew point42°
Fri, 2375° / 51°0
75 °
St. Johns, Friday, 23 October
Overcast. High 75°, low 51°.
Pressure30.12 inHg
Wind14.8 mph S
Humidity45%
Visibility—
Dew point49°
Sat, 2466° / 58°0.66
66 °
St. Johns, Saturday, 24 October
Rain. High 66°, low 58°.
Pressure30.24 inHg
Wind13.7 mph S
Humidity97%
Visibility—
Dew point60°
Sun, 2561° / 55°0.31
61 °
St. Johns, Sunday, 25 October
Light rain. High 61°, low 55°.
Pressure30.12 inHg
Wind9.5 mph NE
Humidity95%
Visibility—
Dew point59°
Mon, 2652° / 42°1.34
52 °
St. Johns, Monday, 26 October
Rain. High 52°, low 42°.
Pressure29.88 inHg
Wind15.3 mph N
Humidity92%
Visibility—
Dew point45°
Tue, 2756° / 40°0
56 °
St. Johns, Tuesday, 27 October
Clear. High 56°, low 40°.
Pressure30.15 inHg
Wind8.7 mph SW
Humidity51%
Visibility—
Dew point36°
Wed, 2857° / 45°0
57 °
St. Johns, Wednesday, 28 October
Partly cloudy. High 57°, low 45°.
Pressure29.91 inHg
Wind6 mph E
Humidity51%
Visibility—
Dew point38°
Thu, 2960° / 42°0
60 °
St. Johns, Thursday, 29 October
Mostly clear. High 60°, low 42°.
Pressure29.83 inHg
Wind16.2 mph W
Humidity59%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3055° / 39°0.07
55 °
St. Johns, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.07 in
Chance of precipitation23%
Record high74° (2024)
Record low27° (1988)
Sat, 3154° / 41°0.11
54 °
St. Johns, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.11 in
Chance of precipitation30%
Record high72° (1974)
Record low24° (1988)
Sun, 0153° / 40°0.13
53 °
St. Johns, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.13 in
Chance of precipitation42%
Record high71° (2016)
Record low24° (2023)
Mon, 0252° / 39°0.15
52 °
St. Johns, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.15 in
Chance of precipitation42%
Record high71° (1961)
Record low24° (2014)
Tue, 0351° / 38°0.07
51 °
St. Johns, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.07 in
Chance of precipitation27%
Record high71° (1987)
Record low22° (1991)
Wed, 0451° / 38°0.07
51 °
St. Johns, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.07 in
Chance of precipitation30%
Record high71° (2015)
Record low19° (1991)
Thu, 0551° / 38°0.13
51 °
St. Johns, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.13 in
Chance of precipitation30%
Record high72° (1978)
Record low19° (1991)
Fri, 0651° / 36°0.09
51 °
St. Johns, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.09 in
Chance of precipitation33%
Record high72° (1975)
Record low24° (1991)
Sat, 0749° / 36°0.06
49 °
St. Johns, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.06 in
Chance of precipitation22%
Record high68° (2020)
Record low22° (1991)
Sun, 0849° / 36°0.04
49 °
St. Johns, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.04 in
Chance of precipitation22%
Record high72° (2020)
Record low18° (1991)
Mon, 0949° / 36°0.08
49 °
St. Johns, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.08 in
Chance of precipitation33%
Record high74° (2020)
Record low20° (2003)
Tue, 1049° / 36°0.1
49 °
St. Johns, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation32%
Record high73° (2020)
Record low18° (2017)
Wed, 1146° / 33°0.11
46 °
St. Johns, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.11 in
Chance of precipitation32%
Record high68° (2020)
Record low19° (2017)
Thu, 1245° / 32°0.05
45 °
St. Johns, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.05 in
Chance of precipitation22%
Record high66° (1964)
Record low6° (2019)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for St. Johns, MI are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in St. Johns, MI since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.